'Younger' in the Bible

and the younger of them said to his father, Father, give me the portion of thy'substance that falleth to me. And he divided unto them his living.

And not many days after, the younger son gathered all together and took his journey into a far country; and there he wasted his substance with riotous living.

But ye'shall not be'so: but he that is the greater among you, let him become as the younger; and he that is chief, as he that doth serve.